From patchwork Thu Jun 6 16:07:45 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Dumitru Ceclan via B4 Relay X-Patchwork-Id: 13688724 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6562D198845; Thu, 6 Jun 2024 16:07:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717690062; cv=none; b=BlwM6aqS0qm0It4hS/3gfW5L6LmfUdbqHeYrGSN2npxef9RkiEVWf2/+J3jcZawrBMTjtR92ACyrdYTdyhkjQLm3nU3otuZvlIMopVvw91BfJ+1OYAfimhBZbAj4N1t9RsbudzRNgrUHwYPjGpd6hkH6ckbblB+ep2JiI5i9i1c= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1717690062; c=relaxed/simple; bh=dgy2A943dFVWcr4xyJIn5kno2jgISeZ5CYUeSn4jwbQ=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=ZAdrnGzks0b94XE3XIyd7SfyBICmoYujn9s16Y8BvhMxkIQs/9GCLgCY7g3dfSi39cnvcBcDkdCKxpaSjA90dn7+D5dyhe8vIICvViy2Q39FgpDK06yQiWpAHLOZehxejvCo8/5HS+B4RDl1rxUpgDRPUZofdL/n/YRgL6rqKcw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=smVFugak; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="smVFugak" Received: by smtp.kernel.org (Postfix) with ESMTPS id 07AAEC4AF19; Thu, 6 Jun 2024 16:07:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1717690062; bh=dgy2A943dFVWcr4xyJIn5kno2jgISeZ5CYUeSn4jwbQ=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=smVFugakJZUO0nj/oidkIb42h9VcmHufBpHWN7b9grcgLCNkda2HrgvJ1rI77KI9G IrbmsVCY8Ia6nzpwnp7Ef548VSTil3uWx9Zs0SSr7puyXmd4uT2NuNgsdrPuQl9029 ojAmB47vP4CRbgbxsZ5gHy8PDnun1E4GFdmJ9fqC2acFxBuVuQYDJEmYZQpUHtic88 dTjk+LrcYMuCgg9VU83qDQNWnQpEfWa6MUY8pvJMKGFNZDOR5TeliwQ1D63jvQvifk ih2iZq+QU/uF2EoDl+OLRmYLq4xMR4ItAc9T2NEAOzGcMCi39Atc8gRwQW6/i1q+6S E5znDsLUhZe7w== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id EE3DEC27C5F; Thu, 6 Jun 2024 16:07:41 +0000 (UTC) From: Dumitru Ceclan via B4 Relay Date: Thu, 06 Jun 2024 19:07:45 +0300 Subject: [PATCH v6 6/9] iio: adc: ad7173: add support for special inputs Precedence: bulk X-Mailing-List: linux-iio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240606-ad4111-v6-6-573981fb3e2e@analog.com> References: <20240606-ad4111-v6-0-573981fb3e2e@analog.com> In-Reply-To: <20240606-ad4111-v6-0-573981fb3e2e@analog.com> To: Ceclan Dumitru Cc: Lars-Peter Clausen , Michael Hennerich , Jonathan Cameron , Rob Herring , Krzysztof Kozlowski , Conor Dooley , David Lechner , linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Dumitru Ceclan X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1717690059; l=4388; i=dumitru.ceclan@analog.com; s=20240313; h=from:subject:message-id; bh=hVN7Wx0S4d3TmvMG178sCl53E62M7EsA/DtotGwBQqo=; b=LAua7k1WT20Gd1RAfZJ+1SPPfBdUeQz0SPDLW4Y3AuIZQUHMBnp98XiaQFNBeK/hXc/bHv1vN RLSSia25SARD6QPVBzlY0aehybhuFvkeKvW7AhpRKC8tSPOS+JXK0Dp X-Developer-Key: i=dumitru.ceclan@analog.com; a=ed25519; pk=HdqMlVyrcazwoiai7oN6ghU+Bj1pusGUFRl30jhS7Bo= X-Endpoint-Received: by B4 Relay for dumitru.ceclan@analog.com/20240313 with auth_id=140 X-Original-From: Dumitru Ceclan Reply-To: dumitru.ceclan@analog.com From: Dumitru Ceclan Add support for selecting REF+ and REF- inputs on all models. Add support for selecting ((AVDD1 − AVSS)/5) inputs on supported models. Signed-off-by: Dumitru Ceclan --- drivers/iio/adc/ad7173.c | 29 +++++++++++++++++++++++++++-- 1 file changed, 27 insertions(+), 2 deletions(-) diff --git a/drivers/iio/adc/ad7173.c b/drivers/iio/adc/ad7173.c index 4040edbd1c32..d16fa081a285 100644 --- a/drivers/iio/adc/ad7173.c +++ b/drivers/iio/adc/ad7173.c @@ -66,6 +66,13 @@ FIELD_PREP(AD7173_CH_SETUP_AINNEG_MASK, neg)) #define AD7173_AIN_TEMP_POS 17 #define AD7173_AIN_TEMP_NEG 18 +#define AD7173_AIN_POW_MON_POS 19 +#define AD7173_AIN_POW_MON_NEG 20 +#define AD7173_AIN_REF_POS 21 +#define AD7173_AIN_REF_NEG 22 + +#define AD7173_IS_REF_INPUT(x) ((x) == AD7173_AIN_REF_POS || \ + (x) == AD7173_AIN_REF_NEG) #define AD7172_2_ID 0x00d0 #define AD7175_ID 0x0cd0 @@ -146,6 +153,8 @@ struct ad7173_device_info { unsigned int id; char *name; bool has_temp; + /* ((AVDD1 − AVSS)/5) */ + bool has_pow_supply_monitoring; bool has_input_buf; bool has_int_ref; bool has_ref2; @@ -216,6 +225,7 @@ static const struct ad7173_device_info ad7173_device_info[] = { .has_temp = true, .has_input_buf = true, .has_int_ref = true, + .has_pow_supply_monitoring = true, .clock = 2 * HZ_PER_MHZ, .sinc5_data_rates = ad7173_sinc5_data_rates, .num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates), @@ -230,6 +240,7 @@ static const struct ad7173_device_info ad7173_device_info[] = { .has_temp = false, .has_input_buf = true, .has_ref2 = true, + .has_pow_supply_monitoring = true, .clock = 2 * HZ_PER_MHZ, .sinc5_data_rates = ad7173_sinc5_data_rates, .num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates), @@ -245,6 +256,7 @@ static const struct ad7173_device_info ad7173_device_info[] = { .has_input_buf = true, .has_int_ref = true, .has_ref2 = true, + .has_pow_supply_monitoring = false, .clock = 2 * HZ_PER_MHZ, .sinc5_data_rates = ad7173_sinc5_data_rates, .num_sinc5_data_rates = ARRAY_SIZE(ad7173_sinc5_data_rates), @@ -259,6 +271,7 @@ static const struct ad7173_device_info ad7173_device_info[] = { .has_temp = true, .has_input_buf = true, .has_int_ref = true, + .has_pow_supply_monitoring = true, .clock = 16 * HZ_PER_MHZ, .sinc5_data_rates = ad7175_sinc5_data_rates, .num_sinc5_data_rates = ARRAY_SIZE(ad7175_sinc5_data_rates), @@ -274,6 +287,7 @@ static const struct ad7173_device_info ad7173_device_info[] = { .has_input_buf = true, .has_int_ref = true, .has_ref2 = true, + .has_pow_supply_monitoring = true, .clock = 16 * HZ_PER_MHZ, .sinc5_data_rates = ad7175_sinc5_data_rates, .num_sinc5_data_rates = ARRAY_SIZE(ad7175_sinc5_data_rates), @@ -288,6 +302,7 @@ static const struct ad7173_device_info ad7173_device_info[] = { .has_temp = false, .has_input_buf = false, .has_int_ref = true, + .has_pow_supply_monitoring = false, .clock = 16 * HZ_PER_MHZ, .sinc5_data_rates = ad7175_sinc5_data_rates, .num_sinc5_data_rates = ARRAY_SIZE(ad7175_sinc5_data_rates), @@ -302,6 +317,7 @@ static const struct ad7173_device_info ad7173_device_info[] = { .has_temp = true, .has_input_buf = true, .has_int_ref = true, + .has_pow_supply_monitoring = true, .clock = 16 * HZ_PER_MHZ, .odr_start_value = AD7177_ODR_START_VALUE, .sinc5_data_rates = ad7175_sinc5_data_rates, @@ -914,9 +930,18 @@ static int ad7173_validate_voltage_ain_inputs(struct ad7173_state *st, unsigned int ain0, unsigned int ain1) { struct device *dev = &st->sd.spi->dev; + bool special_input0, special_input1; + + /* (AVDD1-AVSS)/5 power supply monitoring */ + if (ain0 == AD7173_AIN_POW_MON_POS && ain1 == AD7173_AIN_POW_MON_NEG && + st->info->has_pow_supply_monitoring) + return 0; + + special_input0 = AD7173_IS_REF_INPUT(ain0); + special_input1 = AD7173_IS_REF_INPUT(ain1); - if (ain0 >= st->info->num_inputs || - ain1 >= st->info->num_inputs) + if ((ain0 >= st->info->num_inputs && !special_input0) || + (ain1 >= st->info->num_inputs && !special_input1)) return dev_err_probe(dev, -EINVAL, "Input pin number out of range for pair (%d %d).\n", ain0, ain1);